@misc{1156761,
  author = {A H Brady},
  title = {The normal phase variations of the 18 kcs signals from NBA observed in Frankfurt, Germany:},
  year = {1963},
  month = {1963-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.206-1},
  language = {en},
}